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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Integument cell gelatinisation-the fate of the integumentary cells in Hieracium and Pilosella (Asteraceae)
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Integument cell gelatinisation-the fate of the integumentary cells in Hieracium and Pilosella (Asteraceae)

机译：Integument Cell凝胶化 - Hieracium和PiloSella（Asteraceae）中的整数细胞的命运

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摘要

Members of the genera Hieracium and Pilosella are model plants that are used to study the mechanisms of apomixis. In order to have a proper understanding of apomixis, knowledge about the relationship between the maternal tissue and the gametophyte is needed. In the genus Pilosella, previous authors have described the specific process of the "liquefaction" of the integument cells that surround the embryo sac. However, these observations were based on data only at the light microscopy level. The main aim of our paper was to investigate the changes in the integument cells at the ultrastructural level in Pilosella officinarum and Hieracium alpinum. We found that the integument peri-endothelial zone in both species consisted of mucilage cells. The mucilage was deposited as a thick layer between the plasma membrane and the cell wall. The mucilage pushed the protoplast to the centre of the cell, and cytoplasmic bridges connected the protoplast to the plasmodesmata through the mucilage layers. Moreover, an elongation of the plasmodesmata was observed in the mucilage cells. The protoplasts had an irregular shape and were finally degenerated. After the cell wall breakdown of the mucilage cells, lysigenous cavities that were filled with mucilage were formed.
机译：Genera Hieracium和Pilosella的成员是用于研究apomixis机制的模型植物。为了正确理解Afomixis，需要了解母体组织与配子体之间的关系。在PiloSella属中，先前的作者描述了围绕胚囊囊的细胞的“液化”的具体过程。然而，这些观察结果仅基于光学显微镜水平的数据。我们论文的主要目的是探讨西皮罗斯·官方和HieraciumAlpinum在超微结构水平上的整数细胞的变化。我们发现这两种物种中的Integument Peri-内皮区域由粘液细胞组成。将粘液作为厚层沉积在质膜和细胞壁之间。粘液将原生质体推向电池的中心，并且细胞质桥通过粘液层将原生质盒连接到PlasmodeSmata。此外，在粘液细胞中观察到抗浆瘤的伸长率。原生质体具有不规则的形状，最后退化。在粘液细胞的细胞壁击穿之后，形成填充粘液的溶叠腔。

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